CN114184639B - Thermal diffusion detection method and system of battery system, storage medium and intelligent terminal - Google Patents
Thermal diffusion detection method and system of battery system, storage medium and intelligent terminal Download PDFInfo
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Abstract
The application relates to a thermal diffusion detection method, a thermal diffusion detection system, a storage medium and an intelligent terminal of a battery system, and relates to the field of battery safety technology, wherein the method comprises the steps of obtaining first temperature information of a first detection point and second temperature information of a second detection point; judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not; if the temperature is not greater than the reference temperature, outputting a normal signal; if the temperature is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information; judging whether the value corresponding to the actual temperature information is larger than the reference temperature or not; if the temperature is greater than the reference temperature, outputting an abnormal signal; and if the temperature is not greater than the reference temperature, outputting a prompt signal. The method and the device have the effect of improving the accuracy of the battery system during safety analysis.
Description
Technical Field
The present disclosure relates to the field of battery safety technologies, and in particular, to a method and a system for detecting thermal diffusion of a battery system, a storage medium, and an intelligent terminal.
Background
With the development of battery technology, batteries are often used in the form of a battery system (composed of a plurality of unit cells), and due to the increase of the number of battery bases, safety analysis for the battery system is becoming more important.
In the related art, when the safety of the battery system is analyzed, heat is emitted outwards due to the use of the battery, so that the heat degree of the battery system is often detected to judge whether the battery system is in a safe state, and when the acquired temperature is higher than an allowable temperature value, the abnormal condition of the battery system is indicated.
In view of the above-described related art, the inventors have considered that there is room for improvement in the analysis of safety of a battery system, if a heat source exists outside the battery system, the analysis may be inaccurate.
Disclosure of Invention
In order to improve accuracy of safety analysis of a battery system, the application provides a thermal diffusion detection method, a system, a storage medium and an intelligent terminal of the battery system.
In a first aspect, the present application provides a method for detecting thermal diffusion of a battery system, which adopts the following technical scheme:
a thermal diffusion detection method of a battery system, comprising:
Defining a side wall of the battery system to be provided with a plurality of first detection points and second detection points, wherein the first detection points and the second detection points are in one-to-one correspondence, the first detection points are positions used for detecting internal temperature inside the battery system, and the second detection points are positions used for detecting external temperature outside the battery system;
acquiring first temperature information of a first detection point and second temperature information of a second detection point;
judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
outputting a normal signal if the temperature corresponding to the first temperature information is not greater than the reference temperature;
if the temperature corresponding to the first temperature information is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information;
judging whether the value corresponding to the actual temperature information is larger than the reference temperature or not;
outputting an abnormal signal if the value corresponding to the actual temperature information is greater than the reference temperature;
and outputting a prompt signal if the numerical value corresponding to the actual temperature information is not greater than the reference temperature.
By adopting the technical scheme, when the heat of the battery system is detected, the first temperature information and the second temperature information are respectively acquired, when the temperature corresponding to the first temperature information does not exceed the reference temperature, the battery inside the battery system is indicated to be in a normal use state, when the temperature corresponding to the first temperature information exceeds the reference temperature, the temperature transmitted to the first detection point by the second detection point can be determined according to the temperature corresponding to the second temperature information and the conversion rate, so that the self-heating condition of the battery can be calculated, whether the temperature of the battery exceeds the reference temperature or not can be judged, if so, the self-heating of the battery is serious, the abnormal signal is output to indicate that the safety of the battery is poor, if not, the battery heating is not serious, and the prompt signal is output to prompt the staff that the battery system is influenced by an external heating source, so that the staff can process the heating source in time, and the accuracy of the safety analysis of the battery system is improved.
Optionally, the method further comprises a heat dissipation method, which comprises the following steps:
according to the gear information stored in the preset gear database and the corresponding temperature information, the preset gear information is matched with the first temperature information to determine the current gear information of the cooling fan preset at the first detection point;
Judging whether an abnormal signal exists or not;
if no abnormal signal exists, controlling the cooling fan to adjust to a gear corresponding to the current gear information for cooling;
if an abnormal signal exists, controlling the cooling fan to adjust to a preset highest gear and outputting timing information;
judging whether a normal signal exists when the time corresponding to the timing information reaches the preset heat dissipation time;
if the time corresponding to the timing information reaches the heat dissipation time, outputting a normal operation signal;
and if the time corresponding to the timing information reaches the heat dissipation time, outputting an alarm signal.
By adopting the technical scheme, different gears of the cooling fan are determined to work according to the difference of the temperatures of the first detection points, so that the battery can better dissipate heat, the power consumed by the cooling fan is reduced, and the energy is saved; when the cooling fan does not have a normal signal after the cooling fan works for a preset time period in the maximum gear, the cooling fan is not capable of cooling the current battery state, and an alarm signal is output so that a worker knows the situation, and the worker can conveniently process the situation.
Optionally, the method further comprises:
Defining the temperature corresponding to the first temperature information when the timing information starts to time as the initial temperature, and defining the temperature corresponding to the first temperature information when the time corresponding to the timing information reaches the preset detection time as the end temperature;
acquiring difference temperature information, wherein the temperature corresponding to the difference temperature information is the difference of the ending temperature and the initial temperature;
calculating according to the difference temperature information and the detection time to obtain the temperature rise rate;
judging whether the heating rate is greater than a preset safety rate or not;
if the heating rate is not greater than the safety rate, outputting a heating normal signal;
if the heating rate is greater than the safety rate, controlling the preset fire extinguishing device to operate the battery opposite to the first detection point.
Through adopting above-mentioned technical scheme, judge the size of heating rate in order to judge whether the condition of a fire appears, when the heating rate is greater than safe speed, then the battery generates heat probably because the condition of a fire causes, utilizes extinguishing device to carry out the operation to the battery that generates heat this moment to reduce the condition of the increase of condition of a fire emergence.
Optionally, defining that the second detection point is preset with an air bag, and arranging a gas check valve at the air outlet of the air bag, wherein the gas flow direction of the gas check valve is from the inside of the air bag to the outside;
Acquiring gas volume information of gas blown out by the air bag;
according to the adjustment temperature value stored in the preset temperature database and the corresponding gas volume information, the adjustment temperature value is matched with the gas volume information of the air bag so as to determine a first adjustment temperature;
acquiring pressure information of an extrusion point which is preset on the outer side wall of the battery system and can be extruded by an air bag;
judging whether the pressure value corresponding to the pressure information is consistent with a preset reference pressure value or not;
and if the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjustment temperature and the preset fixed temperature to obtain second temperature information.
By adopting the technical scheme, when the second detection point is heated, the gas in the air bag is heated and expanded to be blown outwards through the gas one-way valve, and the variable temperature value can be judged through the amount of the blown gas in the air bag, so that the second temperature information of the second detection point is determined.
Optionally, if the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the second temperature information obtaining method includes:
controlling a preset air pump to inflate the air bag until a positioning signal is obtained;
acquiring the information of the inflation volume of the gas inflated into the air bag before the occurrence of the positioning signal of the air pump;
Calculating a difference value to obtain difference value volume information, wherein the difference value is the difference of the capacity corresponding to the capacity-reduced gas volume information corresponding to the gas volume information, and updating the difference value volume information into new gas volume information;
according to the adjustment temperature value stored in the temperature database and the corresponding gas volume information, the adjustment temperature value is matched with the difference value volume information to determine a second adjustment temperature;
calculating a difference value to obtain second temperature information, wherein the difference value is the difference of the fixed temperature minus the second adjustment temperature;
and updating the temperature corresponding to the second temperature information to be a new fixed temperature.
By adopting the technical scheme, when the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the air bag is not in an inflated state, which is possibly caused by the fact that the air in the air bag is reduced due to the fact that the temperature of the second detection point is reduced, the air bag is inflated by the air pump so that the air outlet of the air bag can be re-exhausted, and the size of the inflatable volume of the air bag at the temperature is judged according to the volume of the inflated air of the air pump, so that the second temperature information can be obtained.
Optionally, the method further comprises:
acquiring inflation time length information of single operation of the air pump;
Judging whether the time length corresponding to the air charging time length information reaches the preset permission time length or not;
if the time length corresponding to the air charging time length information does not reach the permission time length, outputting a normal air charging signal;
if the time length corresponding to the inflation time length information reaches the permission time length, the air pump is controlled to be closed, and an air bag damage signal is output.
Through adopting above-mentioned technical scheme, in the single operation in-process of air pump, if the operation time length is longer than the permission duration, then probably be that the gasbag is damaged and lead to the gasbag unable to be full of to output gasbag damage signal makes the staff learn this condition, and the staff of being convenient for handles this condition.
Optionally, the method further comprises:
determining first temperature information with highest corresponding temperature in all first temperature information according to a preset ordering rule, and determining battery position information of a corresponding battery according to the first temperature information;
and controlling the preset heat dissipation device to move to the position projection superposition position corresponding to the battery position information to dissipate heat of the battery, wherein the air outlets of the air bags are communicated with the heat dissipation device.
By adopting the technical scheme, the gas blown out from the air outlet of the air bag can enter the heat radiating device, so that the heat radiating device can radiate the battery by using the gas, and the waste of energy sources is reduced; meanwhile, the temperature of the battery in the battery system can be obtained through judging the temperature corresponding to the first temperature information, so that the heat dissipation device can dissipate heat of the battery, and the situation that the temperature of the battery is too high is reduced.
In a second aspect, the present application provides a thermal diffusion detection system of a battery system, which adopts the following technical scheme:
a thermal diffusion detection system of a battery system, comprising:
the acquisition module is used for acquiring first temperature information of the first detection point and second temperature information of the second detection point;
the processing module is connected with the acquisition module and the judging module and is used for storing and processing information;
the judging module is used for judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
if the judging module judges that the temperature corresponding to the first temperature information is not greater than the reference temperature, the processing module outputs a normal signal;
if the judging module judges that the temperature corresponding to the first temperature information is greater than the reference temperature, the processing module calculates a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information;
the judging module judges whether the numerical value corresponding to the actual temperature information is larger than the reference temperature or not;
if the judging module judges that the numerical value corresponding to the actual temperature information is larger than the reference temperature, the processing module outputs an abnormal signal;
If the judging module judges that the numerical value corresponding to the actual temperature information is not greater than the reference temperature, the processing module outputs a prompt signal.
By adopting the technical scheme, when the heat of the battery system is detected, the first temperature information and the second temperature information are respectively acquired through the acquisition module, when the judgment module judges that the temperature corresponding to the first temperature information does not exceed the reference temperature, the battery inside the battery system is not in a short-circuit heating phenomenon, and is in a normal use state, when the judgment module judges that the temperature corresponding to the first temperature information exceeds the reference temperature, the processing module can determine the temperature of the second detection point transmitted to the first detection point according to the temperature corresponding to the second temperature information and the conversion rate, so that the self-heating condition of the battery can be calculated, the judgment module judges whether the temperature of the battery exceeds the reference temperature or not, if the judgment module judges that the temperature exceeds the reference temperature, the self-heating of the battery is serious, the processing module outputs an abnormal signal to indicate that the safety of the battery is poor, and if the judgment module judges that the temperature does not exceed the reference temperature, the battery heating is not serious, the processing module outputs a prompt signal to prompt the staff to influence the battery system by an external heating source, so that the staff can timely process the heating source, and the accuracy of the safety analysis of the battery system is improved.
In a third aspect, the present application provides an intelligent terminal, which adopts the following technical scheme:
an intelligent terminal comprising a memory and a processor, the memory storing a computer program capable of being loaded by the processor and executing any one of the above battery system heat diffusion detection methods.
Through adopting the technical scheme, through the use of the intelligent terminal, when the heat of the battery system is detected, the first temperature information and the second temperature information are respectively obtained, when the temperature corresponding to the first temperature information does not exceed the reference temperature, the phenomenon of short-circuit heating of the battery inside the battery system is not shown, and the battery is in a normal use state, when the temperature corresponding to the first temperature information exceeds the reference temperature, the temperature of the second detection point transmitted to the first detection point can be determined according to the temperature corresponding to the second temperature information and the conversion rate, so that the self-heating condition of the battery can be calculated, whether the temperature of the battery exceeds the reference temperature or not is judged, if the temperature exceeds the reference temperature, the self-heating of the battery is serious, an abnormal signal is output to show that the safety of the battery is poor, if the temperature does not exceed the reference temperature, a prompt signal is output to prompt that the battery system of a worker is influenced by an external heating source, so that the worker can timely process the heating source, and the accuracy of the safety analysis of the battery system is improved.
In a fourth aspect, the present application provides a computer storage medium, capable of storing a corresponding program, and having a feature of improving the accuracy of safety analysis of a battery system, and adopting the following technical scheme:
a computer-readable storage medium storing a computer program capable of being loaded by a processor and executing any one of the above-described heat diffusion detection methods of a battery system.
By adopting the technical scheme, the computer program of the thermal diffusion detection method of the battery system is arranged in the storage medium, when the heat of the battery system is detected, the first temperature information and the second temperature information are respectively acquired, when the temperature corresponding to the first temperature information does not exceed the reference temperature, the battery inside the battery system is indicated to be in a normal use state, when the temperature corresponding to the first temperature information exceeds the reference temperature, the temperature of the second detection point transmitted to the first detection point can be determined according to the temperature corresponding to the second temperature information and the conversion rate, so that the self-heating condition of the battery can be calculated, whether the temperature of the battery exceeds the reference temperature or not can be judged, if the temperature exceeds the reference temperature, the self-heating of the battery is indicated to be serious, an abnormal signal is output to indicate that the safety of the battery is poor, if the temperature does not exceed the reference temperature, a prompt signal is output to prompt that the battery system of a worker is influenced by an external heating source, so that the worker can process the heating source in time, and the accuracy of the safety analysis of the battery system is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the situation that the safety analysis is affected by an external heating source and misjudged can be reduced by judging the temperature of the outer surface of the battery system, so that the accuracy of the safety analysis is improved;
2. the occurrence of the condition that fire extends outwards can be reduced through the judgment of the temperature rising rate, and the safety of the battery system during safety analysis is improved;
3. the gas exhausted by the air bag can be used for heat dissipation of the battery, so that energy waste is reduced.
Drawings
Fig. 1 is a flowchart of a heat diffusion detection method of a battery system.
Fig. 2 is a flowchart of a radiator fan gear selection method.
Fig. 3 is a flowchart of a fire judgment method.
Fig. 4 is a flowchart of a second detection point temperature detection method.
Fig. 5 is a flowchart of an airbag condition detection method.
Fig. 6 is a flow chart of a method of temperature peak heat dissipation.
Fig. 7 is a block flow diagram of a thermal diffusion detection method of a battery system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to fig. 1 to 7 and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Embodiments of the invention are described in further detail below with reference to the drawings.
The embodiment of the application discloses a thermal diffusion detection method of a battery system, which can reduce the influence caused by an external heating source through detecting the internal temperature and the external temperature of the battery system during the safety analysis of the battery system, thereby improving the accuracy of the safety analysis of the battery system.
Referring to fig. 1, a method flow of thermal diffusion detection of a battery system includes the steps of:
step S100: the method comprises the steps of defining a plurality of first detection points and second detection points on the side wall of the battery system, wherein the first detection points correspond to the second detection points one by one, the first detection points are positions used for detecting internal temperature inside the battery system, and the second detection points are positions used for detecting external temperature outside the battery system.
The battery system comprises a shell for placing batteries and a plurality of batteries placed in the shell, the side wall of the battery system is the side wall of the shell, the number of the first detection points and the number of the second detection points are consistent with the number of the batteries, the first detection points are positioned on the inner side wall of the shell and close to the corresponding batteries, the second detection points are positioned on the outer side wall of the shell and opposite to the first detection points, and the first detection points are set by staff according to actual conditions and are not repeated.
Step S101: first temperature information of a first detection point and second temperature information of a second detection point are obtained.
The temperature corresponding to the first temperature information is the temperature of the first detection point, the temperature corresponding to the second temperature information is the temperature of the second detection point, and the temperature can be collected through an instrument capable of measuring the temperature, such as a temperature sensor, which is a conventional technical means of a person skilled in the art and is not described in detail.
Step S102: and judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature.
The reference temperature is the maximum calorific value allowed by the battery, and is set by a worker according to actual conditions, and details are omitted; the purpose of the judgment is to know whether the temperature of the first detection point exceeds the maximum allowable heating value of the battery so as to facilitate the subsequent analysis of the safety of the battery.
Step S1021: and if the temperature corresponding to the first temperature information is not greater than the reference temperature, outputting a normal signal.
When the temperature corresponding to the first temperature information is not greater than the reference temperature, the fact that the temperature of the first detection point does not exceed the allowable temperature value is indicated, and therefore the fact that the temperature of the battery does not exceed the allowable temperature value is indirectly indicated, the battery is in a normal working state at the moment, the problems known by those skilled in the art such as short circuit and the like do not occur, a normal signal is output, so that an external worker can know that the battery system is in a normal running state, and further safety detection analysis is conducted on the battery system by the worker.
Step S1022: if the temperature corresponding to the first temperature information is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information.
When the temperature corresponding to the first temperature information is greater than the reference temperature, it is indicated that the temperature of the first detection point exceeds an allowable temperature value, at this time, the reason for the overhigh temperature of the first detection point is that the battery is likely to generate heat, a heat source exists outside the battery system, the conversion temperature is the temperature at which the second detection point is transmitted to the first detection point, the conversion rate is the conversion rate at which the temperature of the second detection point can be converted to the temperature of the first detection point, the conversion rate is determined by parameters such as a material of a shell of the battery system, and the like, and a worker selects the shell material according to actual conditions and is not repeated; the actual temperature information is the heat emitted by the battery itself and can be represented by the formula T 1 =T 2 *a%+T 3 Calculation, where T 1 T is the temperature corresponding to the first temperature information 2 A% is the conversion rate, T, of the temperature corresponding to the second temperature information 3 The temperature corresponding to the actual temperature information.
Step S103: and judging whether the value corresponding to the actual temperature information is larger than the reference temperature.
The purpose of the judgment is to know whether the temperature of the battery itself exceeds the allowable maximum temperature value so as to judge whether the battery is in a safe state.
Step S1031: and outputting an abnormal signal if the value corresponding to the actual temperature information is greater than the reference temperature.
When the value corresponding to the actual temperature information is larger than the reference temperature, the battery is indicated to have higher temperature, the battery is possibly in a short-circuit abnormal heating state, and an abnormal signal is output to record the situation so as to be convenient for processing the situation subsequently.
Step S1032: and outputting a prompt signal if the numerical value corresponding to the actual temperature information is not greater than the reference temperature.
When the value corresponding to the actual temperature information is not greater than the reference temperature, the temperature of the battery is not high, and at the moment, the first detection point is possibly caused by the existence of a heating source outside, a prompt signal is output to remind a worker to solve the situation, the prompt signal can be any signal with the function of a prompt function, such as a lighting indicator, a loudspeaker sounding and the like, and the method is a common technical means for the person skilled in the art and is not repeated.
Referring to fig. 2, a heat dissipation method is further included, the method including:
Step S200: and matching the first temperature information with the gear information stored in the preset gear database according to the corresponding temperature information to determine the current gear information of the cooling fan preset at the first detection point.
The cooling fan is arranged at the first detection point in advance, a worker opens a hole for supplying wind energy to the cooling fan according to actual conditions, the cooling fan is not communicated with the first detection point and the second detection point, gear information is a gear which can be achieved by the cooling fan, and the worker selects the cooling fan with proper power according to the heating condition of the battery, so that the gear of the cooling fan can meet the requirements; the temperature corresponding to the temperature information is matched with the gear of the cooling fan, for example: the temperature of 20-30 ℃ corresponds to the 'I' gear of the cooling fan, the temperature of 30-40 ℃ corresponds to the 'II' gear of the cooling fan, and the relation between the two gears is set by a worker according to the experimental condition, so that the description is omitted; the gear database is composed of different temperature information and corresponding gear information, and is established by staff through continuous tests, and the establishment process is a conventional technical means of the staff in the field, and is not repeated; when the first temperature information is input into the gear database, the gear information corresponding to the temperature corresponding to the first temperature information can be output, and the gear information is the current gear information of the cooling fan.
Step S201: and judging whether an abnormal signal exists.
The purpose of the judgment is to know whether the temperature of the battery exceeds the allowable maximum temperature value under the action of the cooling fan, so that the subsequent further control of heat dissipation is facilitated.
Step S2011: and if no abnormal signal exists, controlling the cooling fan to adjust to the gear corresponding to the current gear information for cooling.
When no abnormal signal exists, the temperature of the battery can be controlled only through the heat dissipation of the heat dissipation fan at the temperature, and the heat dissipation fan is controlled to be adjusted to the gear corresponding to the current gear information to dissipate heat so that the battery can dissipate heat well.
Step S2012: if the abnormal signal exists, the cooling fan is controlled to be adjusted to the preset highest gear and timing information is output.
When an abnormal signal exists, the fact that the temperature of the battery exceeds an allowable maximum temperature value at the temperature is indicated, and at the moment, the cooling fan is controlled to be adjusted to the highest gear to cool the battery, so that the cooling effect of the battery is improved, wherein the highest gear is determined by the power of the cooling fan, and the gear condition is set by a worker according to the actual condition and is not repeated; the time length corresponding to the timing information is the duration time length when the cooling fan performs the highest gear operation.
Step S202: judging whether a normal signal exists when the time corresponding to the timing information reaches the preset heat dissipation time.
The heat dissipation time is a fixed value set in advance, and can be used for dissipating heat of the battery after the highest gear operation of the heat dissipation fan is performed under normal conditions, and the specific heat dissipation time is set by a worker according to actual conditions and is not described in detail; the purpose of the judgment is to know whether the battery realizes the temperature reduction when the time length of the operation of the cooling fan using the highest gear reaches the cooling time, so that the subsequent further analysis of the battery safety is facilitated.
Step S2021: and outputting a normal operation signal if the normal signal exists when the time corresponding to the timing information reaches the heat dissipation time.
When the time corresponding to the timing information reaches the heat dissipation time, a normal signal exists, which indicates that the battery is cooled under the action of the heat dissipation fan, and the problem of the battery is only temperature rise caused by untimely heat dissipation, and a normal operation signal is output to enable a worker to know that the battery is in a normal working state.
Step S2022: and if the time corresponding to the timing information reaches the heat dissipation time, outputting an alarm signal.
When the time corresponding to the timing information reaches the heat dissipation time and no normal signal exists, the battery is still under the action of the heat dissipation fan under the condition of overhigh temperature, and an alarm signal is output at the moment so that a worker knows the condition, the worker can conveniently and timely process the condition, and the alarm signal is a signal with a prompt function, such as flashing of an indicator lamp, and is a routine technical means for the person skilled in the art and is not repeated.
Referring to fig. 3, the thermal diffusion detection method of the battery system further includes:
step S300: and defining the temperature corresponding to the first temperature information when the timing information starts to time as the initial temperature, and defining the temperature corresponding to the first temperature information when the time corresponding to the timing information reaches the preset detection time as the end temperature.
The detection time is a fixed time length, and is set by a worker according to actual conditions, and is not described in detail; when the timing information starts counting from zero, the temperature corresponding to the first temperature information is the initial temperature, and after the cooling fan acts for detecting time, the temperature corresponding to the first temperature is the final temperature, and the two temperatures are marked so as to be convenient to call.
Step S301: and acquiring difference temperature information, wherein the temperature corresponding to the difference temperature information is the difference of the ending temperature and the initial temperature.
The temperature corresponding to the difference temperature information is the difference between the end temperature and the initial temperature, and the calculation formula is T 13 =T 11 -T 12 Wherein T is 11 T is the temperature value of the final temperature 12 T is the temperature value of the initial temperature 13 The temperature is the temperature corresponding to the difference temperature information.
Step S302: and calculating and obtaining the temperature rise rate according to the difference temperature information and the detection time.
The temperature rising rate represents the temperature rising speed of the battery, and the calculation formula is thatWherein->For the duration corresponding to the detection time, +.>Is the value of the temperature rising rate.
Step S303: judging whether the temperature rising rate is larger than a preset safety rate.
The safety rate is a fixed value, is the speed maximum value of the temperature rise of the battery, is not the speed maximum value of fire, is obtained by staff according to multiple tests, is a routine technical means for the staff in the field, and is not repeated; the purpose of the judgment is to know whether the heating rate exceeds the safety rate so as to judge whether a fire occurs.
Step S3031: and if the temperature rising rate is not greater than the safety rate, outputting a temperature rising normal signal.
When the heating rate is not greater than the safety rate, the fact that no fire condition occurs in the battery is indicated, and a heating normal signal is output at the moment so that a worker knows the condition, the worker can remove the fire condition, and the worker can find out the heating reason of the battery in time conveniently so as to process the condition in time.
Step S3032: if the heating rate is greater than the safety rate, controlling the preset fire extinguishing device to operate the battery opposite to the first detection point.
When the heating rate is greater than the safety rate, the battery heating rate is too fast, and the fire is probably caused at this moment, the fire extinguishing device is controlled to extinguish the fire to the battery corresponding to the first detection point, so that the condition of fire diffusion is reduced, wherein the fire extinguishing device is a device for extinguishing fire, which is arranged in a battery system in advance, and the fire extinguishing device used in the application comprises a first fire extinguisher and a second fire extinguisher, wherein the first fire extinguisher can be a carbon dioxide fire extinguisher, the second fire extinguisher can be a dry powder fire extinguisher, when the fire occurs, the first fire extinguisher is used for presetting duration, and if the temperature does not drop, the second fire extinguisher is used for extinguishing fire.
Referring to fig. 4, the second temperature information acquisition method includes:
step S400: an air bag is preset at the second detection point, a gas check valve is arranged at a gas outlet of the air bag, and the gas flow direction of the gas check valve is from the inside of the air bag to the outside.
The air bag is arranged at the second detection point, the initial gas in the air bag is in a state of swelling the air bag at room temperature, the air bag cannot continuously expand outwards at the moment, and the gas one-way valve is arranged at the gas outlet of the air bag so as to control the flow direction of the gas at the gas outlet of the air bag, so that the external gas cannot enter the air bag through the gas outlet of the air bag.
Step S401: and acquiring gas volume information of the gas blown out by the air bag.
The volume corresponding to the gas volume information is the amount of the gas blown out from the gas outlet by the gas bag, can be obtained by a flow rate sensor, and is a conventional technical means for a person skilled in the art, and is not described in detail.
Step S402: and matching the gas volume information of the air bag with the adjustment temperature value stored in the preset temperature database and the corresponding gas volume information to determine a first adjustment temperature.
The temperature value is adjusted to be the temperature value to be adjusted, when the air bag is heated, the air in the air bag is heated and expanded to move out of the air bag from the air outlet, and the moved air quantity is different due to different temperatures, so that the temperature to be adjusted relative to the room temperature can be determined according to the air volume information, a temperature database can be established according to different air volume information and corresponding temperature adjustment values, and the establishment process of the temperature database is a conventional technical means of a person skilled in the art and is not repeated; when the gas volume information of the air bag is input into the temperature database, a relative adjustment temperature value, namely a first adjustment temperature, can be matched.
Step S403: pressure information of an extrusion point preset on the outer side wall of the battery system and capable of being extruded by the air bag is obtained.
The extrusion point is a pressure sensor arranged on the outer side wall of the shell, when the air bag is in a full state, the air bag can extrude the extrusion point, and the pressure value corresponding to the pressure information is the extrusion force of the air bag on the extrusion point.
Step S404: and judging whether the pressure value corresponding to the pressure information is consistent with a preset reference pressure value.
The reference pressure value is the extrusion force of the extrusion point extrusion under the state that the air bag is in the full state, and the purpose of judgment is to know whether the air bag is in the full state or not so as to judge whether the air bag is in the temperature rising state or not.
Step S4041: and if the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjustment temperature and the preset fixed temperature to obtain second temperature information.
When the pressure value corresponding to the pressure information is equal to the reference pressureWhen the force values are consistent, the air bag is always in a full state, namely the air bag is in a heating state, a positioning signal is output to mark the situation, the fixed temperature is room temperature, the working personnel sets according to the environment, and the calculation formula of the temperature corresponding to the second temperature information is T 2 =T 0 +T 4 Wherein T is 0 At a fixed temperature T 2 T is the temperature corresponding to the second temperature information 4 Is the first adjusted temperature.
Step S4042: if the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the preset air pump is controlled to inflate the air bag until the in-place signal is obtained.
When the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the air bag is not in a full state, and the air bag is possibly reduced after the temperature of the air bag is reduced, so that the second temperature information cannot be determined through the air outlet quantity; the air pump is a device which is always connected with the air bag and is used for supplying air to the air bag, the air pump is used for continuously inflating the air bag until a positioning signal is acquired, the air bag is in a full state under the inflation effect of the air pump, and when the positioning signal is acquired, the air pump stops running.
Step S405: and acquiring the information of the inflation volume of the gas inflated into the air bag before the in-place signal of the air pump occurs.
The volume corresponding to the inflation volume information is the single inflation volume of the air pump to the air bag, and can be obtained through a meter arranged at the air outlet of the air pump, which is a conventional technical means for the person skilled in the art.
Step S406: and calculating a difference value to obtain difference value volume information, wherein the difference value is the difference of the capacity corresponding to the gas volume information minus the capacity corresponding to the gas volume information, and updating the difference value volume information into new gas volume information.
The difference volume information is the volume difference of the inflated air bag compared with the air bag filled for the first time, whether the air bag is increased or decreased compared with the air bag filled for the first time can be judged by the volume difference, and the difference volume information is updated into new gas volume information so as to facilitate the calculation of the volume change of the air bag at the next time, wherein the differenceThe calculation formula of the capacity corresponding to the volume information is Q 0 =Q 2 -Q 1 Wherein Q is 0 For the corresponding capacity of the difference volume information, Q 1 For the volume corresponding to the inflation volume information, Q 2 The volume corresponding to the gas volume information.
Step S407: and matching the adjustment temperature value stored in the temperature database and the corresponding gas volume information with the difference volume information to determine a second adjustment temperature.
When the difference volume information is input into the temperature database, an adaptive adjustment temperature value, namely a second adjustment temperature, can be output.
Step S408: and calculating a difference value to obtain second temperature information, wherein the difference value is the difference of the fixed temperature minus the second adjustment temperature.
The temperature corresponding to the second temperature information is the temperature of the air bag after the temperature is reduced, and the calculation formula is T 2 =T 0 -T 5 Wherein T is 5 The second adjustment temperature.
Step S409: and updating the temperature corresponding to the second temperature information to be a new fixed temperature.
And updating the temperature corresponding to the second temperature information to be a new fixed temperature so as to facilitate the calculation of the temperature of the air bag after heating or cooling.
Referring to fig. 5, the thermal diffusion detection method of the battery system further includes:
step S500: and acquiring inflation time length information of single operation of the air pump.
The time length corresponding to the inflation time length information is the time length of the operation of the air pump in a single operation, can be completed through any instrument capable of timing, and is a conventional technical means for a person skilled in the art, and is not repeated.
Step S501: judging whether the time length corresponding to the inflation time length information reaches the preset permission time length.
The allowable time length is the maximum time length allowed by the air supply pump, which is preset in advance, and is set by a worker according to actual conditions, and is not repeated; the purpose of the judgment is to know whether the operation time of the air pump exceeds the permission time so as to judge the state of the air bag.
Step S5011: and if the time length corresponding to the inflation time length information does not reach the permission time length, outputting a normal inflation signal.
When the time corresponding to the inflation time information does not reach the permission time, the air pump is not operated for a time longer than the permission time, the air bag can be inflated normally at the moment, a normal inflation signal is output to record the situation, and workers can know the situation conveniently.
Step S5012: if the time length corresponding to the inflation time length information reaches the permission time length, the air pump is controlled to be closed, and an air bag damage signal is output.
When the time corresponding to the inflation time information reaches the permission time, the air pump is indicated to run for longer than the permission time, the air bag is not fully inflated at the moment, the condition that the air bag is possibly damaged is indicated, the air pump is controlled to be closed so as to save energy, an air bag damage signal is output so that staff can know the condition, and the staff can conveniently count the condition.
Referring to fig. 6, the thermal diffusion detection method of the battery system further includes:
step S600: and determining the first temperature information with the highest corresponding temperature in all the first temperature information according to a preset ordering rule, and determining the battery position information of the corresponding battery according to the first temperature information.
The sorting rule is a method capable of sorting the sizes, such as an bubbling method, and is a conventional technical means for those skilled in the art, and is not described in detail; the first temperature information with the highest corresponding temperature can be determined through the ordering rule, the first detection point can be determined according to the first temperature information, and then the battery position information of the corresponding battery can be determined through the position of the first detection point.
Step S601: and controlling the preset heat dissipation device to move to the position projection superposition position corresponding to the battery position information to dissipate heat of the battery, wherein the air outlets of the air bags are communicated with the heat dissipation device.
The heat dissipation device is a device capable of gathering and releasing wind power, and can be an air pipe, air outlets of all air bags are communicated with the heat dissipation device, so that air blown out by the air bags can be blown out through the heat dissipation device, and the movement of the heat dissipation device can be linear module driving or cylinder driving, which is a conventional technical means for a person skilled in the art and is not repeated; the battery with the highest temperature in all the batteries can be further cooled through the movement of the cooling device, so that the stability of the battery in the use process is improved, the waste of gas blown out by the air bag is reduced, and the energy is saved.
Referring to fig. 7, based on the same inventive concept, an embodiment of the present invention provides a heat diffusion detection system of a battery system, including:
the acquisition module is used for acquiring first temperature information of the first detection point and second temperature information of the second detection point;
the processing module is connected with the acquisition module and the judging module and is used for storing and processing information;
the judging module is used for judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
If the judging module judges that the temperature corresponding to the first temperature information is not greater than the reference temperature, the processing module outputs a normal signal;
if the judging module judges that the temperature corresponding to the first temperature information is greater than the reference temperature, the processing module calculates a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information;
the judging module judges whether the numerical value corresponding to the actual temperature information is larger than the reference temperature or not;
if the judging module judges that the numerical value corresponding to the actual temperature information is larger than the reference temperature, the processing module outputs an abnormal signal;
if the judging module judges that the numerical value corresponding to the actual temperature information is not greater than the reference temperature, the processing module outputs a prompt signal;
the gear adjusting information module is used for adjusting the gear of the cooling fan, so that the gear of the cooling fan can be automatically adjusted according to the actual temperature, and the cooling effect of the battery is better;
the fire processing module is used for judging whether a fire occurs or not, so that the fire can be processed in time, and the safety of the test is improved;
the first temperature acquisition module is used for acquiring the temperature of the outer surface of the battery system after the temperature is increased;
The second temperature acquisition module is used for acquiring the temperature of the outer surface of the battery system after the temperature is reduced;
the air bag detection module is used for detecting whether the air bag is damaged or not so as to reduce the occurrence of useless air blowing operation of the air pump;
and the heat radiation module is used for radiating heat at the position with the highest internal temperature of the battery system, so that the occurrence of the condition that the internal temperature of the battery system is too high is reduced.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.
Embodiments of the present invention provide a computer-readable storage medium storing a computer program capable of being loaded by a processor and executing a heat diffusion detection method of a battery system.
The computer storage medium includes, for example: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Based on the same inventive concept, an embodiment of the present invention provides an intelligent terminal including a memory and a processor, wherein the memory stores a computer program capable of being loaded by the processor and executing a thermal diffusion detection method of a battery system.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, in which any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Claims (9)
1. A method for detecting thermal diffusion of a battery system, comprising:
defining a side wall of the battery system to be provided with a plurality of first detection points and second detection points, wherein the first detection points and the second detection points are in one-to-one correspondence, the first detection points are positions used for detecting internal temperature inside the battery system, and the second detection points are positions used for detecting external temperature outside the battery system;
acquiring first temperature information of a first detection point and second temperature information of a second detection point;
judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
outputting a normal signal if the temperature corresponding to the first temperature information is not greater than the reference temperature;
if the temperature corresponding to the first temperature information is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information;
judging whether the value corresponding to the actual temperature information is larger than the reference temperature or not;
outputting an abnormal signal if the value corresponding to the actual temperature information is greater than the reference temperature;
if the value corresponding to the actual temperature information is not greater than the reference temperature, outputting a prompt signal;
The second temperature information acquisition method comprises the following steps:
defining a second detection point to be preset with an air bag, wherein an air outlet of the air bag is provided with an air one-way valve, and the air flow direction of the air one-way valve is from the inside of the air bag to the outside;
acquiring gas volume information of gas blown out by the air bag;
according to the adjustment temperature value stored in the preset temperature database and the corresponding gas volume information, the adjustment temperature value is matched with the gas volume information of the air bag so as to determine a first adjustment temperature;
acquiring pressure information of an extrusion point which is preset on the outer side wall of the battery system and can be extruded by an air bag;
judging whether the pressure value corresponding to the pressure information is consistent with a preset reference pressure value or not;
and if the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjustment temperature and the preset fixed temperature to obtain second temperature information.
2. The heat diffusion detection method of a battery system according to claim 1, characterized in that: also included is a method of dissipating heat, the method comprising:
according to the gear information stored in the preset gear database and the corresponding temperature information, the preset gear information is matched with the first temperature information to determine the current gear information of the cooling fan preset at the first detection point;
Judging whether an abnormal signal exists or not;
if no abnormal signal exists, controlling the cooling fan to adjust to a gear corresponding to the current gear information for cooling;
if an abnormal signal exists, controlling the cooling fan to adjust to a preset highest gear and outputting timing information;
judging whether a normal signal exists when the time corresponding to the timing information reaches the preset heat dissipation time;
if the time corresponding to the timing information reaches the heat dissipation time, outputting a normal operation signal;
and if the time corresponding to the timing information reaches the heat dissipation time, outputting an alarm signal.
3. The heat diffusion detection method of a battery system according to claim 2, characterized in that: further comprises:
defining the temperature corresponding to the first temperature information when the timing information starts to time as the initial temperature, and defining the temperature corresponding to the first temperature information when the time corresponding to the timing information reaches the preset detection time as the end temperature;
acquiring difference temperature information, wherein the temperature corresponding to the difference temperature information is the difference of the ending temperature and the initial temperature;
calculating according to the difference temperature information and the detection time to obtain the temperature rise rate;
Judging whether the heating rate is greater than a preset safety rate or not;
if the heating rate is not greater than the safety rate, outputting a heating normal signal;
if the heating rate is greater than the safety rate, controlling the preset fire extinguishing device to operate the battery opposite to the first detection point.
4. The heat diffusion detection method of a battery system according to claim 1, characterized in that: if the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the second temperature information acquisition method comprises the following steps:
controlling a preset air pump to inflate the air bag until a positioning signal is obtained;
acquiring the information of the inflation volume of the gas inflated into the air bag before the occurrence of the positioning signal of the air pump;
calculating a difference value to obtain difference value volume information, wherein the difference value is the difference of the capacity corresponding to the capacity-reduced gas volume information corresponding to the gas volume information, and updating the difference value volume information into new gas volume information;
according to the adjustment temperature value stored in the temperature database and the corresponding gas volume information, the adjustment temperature value is matched with the difference value volume information to determine a second adjustment temperature;
calculating a difference value to obtain second temperature information, wherein the difference value is the difference of the fixed temperature minus the second adjustment temperature;
and updating the temperature corresponding to the second temperature information to be a new fixed temperature.
5. The method for detecting thermal diffusion of a battery system according to claim 4, wherein: further comprises:
acquiring inflation time length information of single operation of the air pump;
judging whether the time length corresponding to the air charging time length information reaches the preset permission time length or not;
if the time length corresponding to the air charging time length information does not reach the permission time length, outputting a normal air charging signal;
if the time length corresponding to the inflation time length information reaches the permission time length, the air pump is controlled to be closed, and an air bag damage signal is output.
6. The method for detecting thermal diffusion of a battery system according to claim 5, characterized in that: further comprises:
determining first temperature information with highest corresponding temperature in all first temperature information according to a preset ordering rule, and determining battery position information of a corresponding battery according to the first temperature information;
and controlling the preset heat dissipation device to move to the position projection superposition position corresponding to the battery position information to dissipate heat of the battery, wherein the air outlets of the air bags are communicated with the heat dissipation device.
7. A thermal diffusion detection system of a battery system, comprising:
the acquisition module is used for acquiring first temperature information of the first detection point and second temperature information of the second detection point;
The processing module is connected with the acquisition module and the judging module and is used for storing and processing information;
the judging module is used for judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
if the judging module judges that the temperature corresponding to the first temperature information is not greater than the reference temperature, the processing module outputs a normal signal;
if the judging module judges that the temperature corresponding to the first temperature information is greater than the reference temperature, the processing module calculates a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate and the temperature corresponding to the second temperature information;
the judging module judges whether the numerical value corresponding to the actual temperature information is larger than the reference temperature or not;
if the judging module judges that the numerical value corresponding to the actual temperature information is larger than the reference temperature, the processing module outputs an abnormal signal;
if the judging module judges that the numerical value corresponding to the actual temperature information is not greater than the reference temperature, the processing module outputs a prompt signal;
the second temperature information acquisition method comprises the following steps:
the processing module defines that an air bag is preset at the second detection point, a gas one-way valve is arranged at the gas outlet of the air bag, and the gas flow direction of the gas one-way valve is from the inside of the air bag to the outside;
The acquisition module acquires gas volume information of gas blown out by the air bag;
the processing module is matched with the gas volume information of the air bag according to the adjustment temperature value stored in the preset temperature database and the corresponding gas volume information to determine a first adjustment temperature;
the method comprises the steps that an acquisition module acquires pressure information of an extrusion point which is preset on the outer side wall of a battery system and can be extruded by an air bag;
the judging module judges whether the pressure value corresponding to the pressure information is consistent with a preset reference pressure value or not;
if the judging module judges that the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjusting temperature and the preset fixed temperature to obtain second temperature information.
8. An intelligent terminal comprising a memory and a processor, the memory having stored thereon a computer program capable of being loaded by the processor and performing the method according to any of claims 1 to 6.
9. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any of claims 1 to 6.
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